Grinding-machine.



R. wg. NIGGLAYSEN & E. H. LA VERGUMBB.

GBINDING MAGHINE.

APPLxcATIoN FILED 0mm, 1912.

Patented June 23, 1914.

-4 SHEETS-SHEET 2.

R. M, SGSYEEN :YL Hf EL 'LA VERGMB. @Hmmm Mmmm PILIOAII'XON FILED D'G.18 19112.

Patented yJima 23, 1914l 4 SHEETS-SHEET 3 @BINDING MACHINE.-

APPLICATION FILED 0G1.1B, 1912.

mama June 23,1914

4 SHEETS-SHEET 4. l

Efff1 a susa s [n van fers' GRNEING- Specification ai 'Letters Satent.

Application filed October la, l. Serial No. 726,5?3.

T0 all whom t may coment; feed mechanism and prevents further cut- 55.

Be it known that we, RAGNVALD M. Nico-y ting. Larsen, a subjectoftheKingof Norway/ganci lndetail, A is a suitable frame, ton which HARLEYH. La VERCOMBE, a citifzen of the ismounted the Work-holding spindle l,pret- United States of America, resi-ding at De erably Iarranged withits axis vertical. troit, in the county of Wayne and State of C is areciprocatory slide mounted upon Go Michigan, have invented certain new.and guide-Ways D uponthe frame; and E isth useful lmprovements inGrindinglachines, Vgrinder arbor which is vmounted upon bean of whichthe following is specification, ings F on said slide. rllhe artis ot thearbor reference being had therein to the accom- E is transverse totheaxis of the arbor B, panying drawings. and provision is made foradjustment of l65 The invent-ion ,relates to grinding maboth the planeof the grinder and of the chines and has for its particular object theWork. obtaining of a construction adapted for the AFor adjusting theWork-holding arbor B, renewing of millingcutters. it is provided with atelescopic extension B,

-ii'here milling cutters are formed by ma-. which has threadedengagement with the lo chining the annealed metal and subsequently mainsection and is vheld in different posihardening, the cutters thus formedmay be tions of adjustment by alocir-nut This sharpened by grinding onan ordinary scctinn B has a shank portion B3 on which grinder Wheel, buteventually the teeth will the Werl; is placed, a 'clan'ipii'ig--nut l@enbe completely ground away, which is the a threaded portion of saidshank 75 limit of life of the cutter. The blanks can- .eri ing` to clamp'the Work, and a bushingnot be satisfactorily annealed and re-cut, ascollar B centering the same. y there is great danger of crackin,partici@ lpen the lower end of the arbor B is larly when the metal isre-,hardenedl This is mounted an indexing dish G, which is prolespecially true of high-speed steel. vided with a plurality of series ofaccu so 'Vith our improved grinder the cutters lately-spaced apertures aat different radial may be refashioned-'Without annealing and distancesfrom the center. their life thereby greatly prolonged. G is areciprocatory rocher member, uh ln the drawings: Figure l is a sectional@ruined upon the arbor B, and. carrying ay plan View ot the machine;Fig. 2 is a iondoe' (lf3 V:for engaging the apertures ct in the 85gitudinai ection thereof; Fig. 3 'is a cross index plate. rihis dog ismounted in an ad section; D. Li is View similar to Fig.' l, Justable*block G4, slidably engaging' the with the section in the plane oi' thearbor; rocker-arm Gf, and provided with a shank and Fig. 5 is asideelevation of the feed .G5 'tor adjust-ing it inward oroutw'ard. Themechanism, i shank is provided with a series et notches 9e Generallydescribed, our improved grind- G6 which are engaged` by a pointedY pinGJ ing machine comprises a rotatively adjustengaging a bearing G8 on therocher G', and able Work-holding spindle; indexing mechheldin engagementby a threaded plug Gf anism, controlling the adjustment t-herebearingthereagainst; While a spring G10 of; a' grinder Wheel; means forintermitserves to disengage said pin 'when the prcs- 9.5 tently*reciprocating 'said' grinder Wheel. wsure is released. rl`hus, byengaging the pin l toward and from the periphery of the y in differentnotches Gr, the dog' is regis- Work upon said holder, said means opteredwith diiierent series of agertnres. erating alternately With theoperation `of For reciprocating the roch-er fd', and for said indeX'inGmechanism; and the maengaging and disengaging the dog @t3 cams loi)chine is further provided With automatic are'provided Which arepreferably arranged feeding means by which, at the compl'eupon a'commonshaft This shaft extends tion of each cycle of the Work-holder, thetransversely of the frame A and is driven by limit of forward movementof the vgrinder any suitable mechanism. (not shown). is adjusted so thatt-he successive grinding H is a cam upon the shaft if, which yenina cutswill be deeper. This action continues gages a reciprocatory slide lmounted in until the-required depth of cut is obtained, the frame, saidslide having a transverselym whereupon an automatic trip disengages thei extending slotv L therein.

-49 rod is 12 is a.l pin' having a squared portion?) engaging the slot Iand a rounded portion c passing 'through the adjustable block G4 andhollow to receive the dog G2.

I3 is a spring operating upon the slide I in a directionopposed to thecam H', the arrangement being such that during-the 'rotation of thecamvthe slide I Will be reciprocated, which will imparta reciprocat- '10ing movement to the pin I2, block G4, rocker Gr and dog G3; while thesegmental path of moyement of the rocker, pinl and dog is permitted by atransverse sliding movement l -of the pin in the slot I. l`Upon the'slide. I is 'L5 mounted a rock shaft J, having a rock-arm J vfeatheredthereon, said rock-arm being attaeed at its outer end to. the shank 'ofthe do 3.

' 2 is' a: second rock-arm att-ached to the '20 `shaft J, and whichextends into operative relation to a cam H2 .upon the cam shaft H.

The cam H2 'is smtimed as toactuate the rock-arm J2, andthrough themedium ofI the rock-arm' J will withdraw the dog G3 after thecompletionof thelforward movef;

ment of the slide l and befmfe the return thereof. Thus through thecombined action 'of the cams H and H2 the vindex disk G "is periodicallyrotated with a step-by-step '30. movement, which adjusts the workuponthe holder B to different positions` or grinding.

` For moving the grinder into engagement with theV workand forwithdrawing the samewhenthe work holder is to be ad;l

justed, an intermittent, reciprocatory movement is imparted to the slideC. E1s shown, vthe shaft. H has mounted thereon an eccentric Hv3engaging a rod K, which is connected to-a threaded rod L. :This threadedengaged by a' correspondingly threaded socket member L,-'Which is rotati'vely lsecured ina bearingM upon aslide M; The slide M is adjustablycon nected to the 'slide C, through the medium .i4-Spf a clamping boltN, which has a head N 5 al feed mechanism for gradually changing the.limit of inward movement of the grinder, so that the .grinding cuts Willbe successively deepened. This feeding is effected by the rotation ofthe socket ,mem-

550 ber j inits bearing M, Whifh 'in turn is operated byV mechanism ottie T'following construction: L2 is an extension of the member L,`whichis socketed to telescopically Vengage a rod O, which is rotativelyfixed' by a feather 0. The rod O extends through,

the ratchetlfwheel P2 and shaft P.

prevented,

"menaaa a bearing O2 in the ame and is connected by a Wormcaring Pwith ashaft P', having a ratchet-w eel P2 thereon. Q is a ratchetlevercarrying a dog Q for engaging the ratchet-whe@ P2, said lever beingulcrumed .upon the shaft P and being intermittently reciprocated by ar'od Q3 connectedto a lever Q, extending into the path of a cam Q on theperiphery of the indexin disk G. Thus once in each complete revoltion ofsaid indexing disk. the cam Qs will actuate the lever Q4', rod Q3,ratchet-lever Q and dog Q', to impart a rotative movement to The amountof feedmay be variedby changing the point "oattachment of the rod Q3 tothe ratchetlever Q, and, as shown, a plurality of apertures Q2v areformed in the vlever for engagement of the connecting pin.

With the mechanism just described, the depth of out of the grinder isincreasedl after each complete revolution of the workholder, and thiscontinues until the req'uired .depth is obtained. To preventovervcutting I have provided means for automatically throwing out thefeed mechanism,

which may be set for any required depth.

of cut. This comprises a rotating cam or trip-lever R, mounted upon theratchet-lever Q,"and' connected to a notched feed-Wheel R engaged by awheel R2 on the shaft P.

j Ra isa tooth on the wheel R2., which once in eachrevolution of .thelatter engages a notch in the Wheel R2, impart-ing a limited rotativemovement thereto before disengagement-, The trip-lever -R is adapted toengage with. a pin vor lugI S upon the' dog Q to Withdraw said dog fromthe ratchet- Wheel P. vSaid'member R is also preferably clamped to thewheel R so -as to permit of a relative adjustment thereon, and thearrangement is such that by properly setting the member anydesirededegree of feed maybe imparted to the grinder before the dbg Qwill be disengaged and further Afeed With the construction as describedin use, the operation is as follows: The worm mill'- ing-c'utter orother blank to be re-cut, is first placed uponthe Work-holding spindleBand the latter is longitudinally adjusted if necessary to properlycenter the blank in relation to the arbor of the grinder, this'adjustment being eil'ected by screwing the member B uponI the member Band clamping by the lock-nut B2. When the Work is properly set, thegrinder wheel is set in relation thereto by loosening the clamping boltNfand adjusting the grinder wheel into Contact with the periphery of theblank; while the rotation of the cam shaft H `mil' cause thereciprocation of ,the slides' M and@ through the" medium of theeccentric lie.' and rods K and L; andvl'during the ,interval When rtheslides .are at the outer" end of their Inoveinward to carry the grinderWheel. in to theV -ivillfl correspondingly deepen the grinding Worlg, itwill effect a grinding ofl a diferent portion of the periphery of theblankuntil the eompletion'of a revolution of the latter.

When thisoccurs l thecani Q; operating the lever QQ rodQa' and-ratchet-le,ver Q, will cause a rotation? of. the ratchet-Wheel P2,-

s'haft P1", Worm-gearing P and rod (L the latter communicating. movementfrom :the eather.; 0 and' e'iitensionlfto the member. "Lf, jvhch .isslightly rotatively adjusted. This'a feed, preferably Varyingfrom one.v

to'- five yor six'thousandt'hs, is produced-.Which ents jin the 'secondrevolution ci" the lblank 'and the operation' :will thus continue until.

tirati-@Jever D disengages .the dog. Q-from the,ratchet'-vvheel P2,which will stop further. 'a'ctiloiil4 The blank may thenbe disengaged:from-the spindle'B and the machine re-'set ,by turning'back the feedmechanism throughv the medium of a knoborhandle P4' on vthe gshaft'Pf".'jnsti'ng the grinder Wheel axiallyto suit the requirements ofdifferent, blanks, and-to this fend We-have -provided-'.the' followingconstruction; The. grinder arbor E is journaled 4.iiifth bearings F, andcomprises 'an inner shaft E and: asurrounding sleeveEzL The i-.olampiiigcollars E3 tor the grinder" Wheel- 'are securedto the member E', Whilethe j our- 'sleeve 'nienilee` E2.

nals'and. the drive-pulley E? are uponthe' Esis a shank extending uoutward from the shaft E beyond one of the bearings-fil, and carryingatits outer end an i jantilfrictioinball thrust hearing T, Whichis carried'b'yia housing T. fisattachd td a l threaded sleeve T2 surroi'md-y ingthe"sh'a'nl4 E5 and 'engaging a nut T? arranged.betweenv urcations ofene of the Vbearings F. The larra'ngement.is such that adjusting the.nut Tf', the sleeve T2 will be nioved longitudinally and will carry,-with 'it-. the-shank E? and shaftlithereby adjusting 'the position ofthe grinder-ivheel.

. What-We ciai'm as our invention 1s:

i tative Work-holder, a rotary grinder ar 'rangedin a transverse plane,means for intermittently, relatively reciprocating said- 'Werk-holderand grinder to move the latter toward and from the periphery of theWork,A

l. A grinding machine comprising a roand means operating when thegrinder 'is withdrawn from engagement With the -Work for adjusting said.Work-holder rotat1vely,

rlhis housing T yfeed mechanism for periodically increasing' the dept-hof thecut. v j

2. A grinding'machine'comprising' a rotativev Work-holder, arotaryjgrindeif arranged' in' a vtransverse plane, means forl relativelyreciprocating saidl work-holder and grinder to move the latter towardand from the periphery ofthe Work, means operating durN ,ing theinterval when saidgrinder isiivithrdrawn from vthe ivorlr, forrotatively 'adjust` 4'ing said 'Work-holder., to present a dii-ferentportion yof the periphery of the Work to said grinder', and' meansoperating in each cycle ofv the Work-holder. for changing the limit ofinward movement of said grinder. to .increase the depth of the cut. j

3. v A grinding machine comprising a rota- 'tive Worloholder, a rotarygrinder arranged in a transverse plane, means forfrelativelyvreciprocating said Work-holder and grinder to movethe latter toward andfrom the pe# ripheryothe Werk,A means operating during the interval' inwhich the vgrinder is :Withdrawn from the Werl: for rotativelyadjustiiig said Work-holder, and feed ineclia-- 'nismgarrangedintermediate the grinder and f4. A; grinding machine comprising arotative vork-holder, a rotary grinder ar- Itfis 'desirable to vprovidemeans of ad-- '.'ranged inl aj transverse plane, means torre ciprocatingsaid grinder to move the same tovvardand from the rperiphery of' theWork, means operating during the interval in which the 'grinder' islWithdrawn from the Work' for rotatively adjusting -sa-id Workholder,feed mechanism arranged intermediate said grinder' and its reciprocatingmeans, and means operatingoncein each cycle of said rotary Work-holdervfor operating said feeding means to. adjust inward the limit-- ofmovement of said grinder.

5. A. grinding 'machine comprising a TOE tative Work-holder, a rotarygrinder `ar ranged in a transverse plane, 'a reciprocatoryl carriage onwhich said vgrinder is mounted, adaptedto ymove the latter toward andfrom 'the periphery of vthe Work, a reciprocating -meniber7V anadjustable connection between said 4reciprocat-ing member and saidreeiprof.

reatery carriage,v permitting ci the 'adjust-4 ment of thelatter Withrelation to thevvorir,

.feed mechanism operating once ineach cycle i fra1ne,'a reciprocatoryslide mounted ori-said frame, a rotating arbor mounted .on said' slide7a grinder-wheell mounted len lsaid ar.-

ilo

ree

bor, ,a rotative Work-holder having'its axis l :transverse to the axisof said arbor, means for adjusting `the Work axially of saidWorlrdifferent' portion Aof the p'e. rpheyof he l-Worlr m said grinder.and;

lholdenmeans tor adius'ting .thegrinder ax ially of said arbor, meansfor reciprocating said slide to move said grinder vtoward and from theperiphery of the Work, indexing mechanism 'for the rotativea'dji'istn'ient of said Work-holder, and means for operating saidindexing mechanism during the interval in which said grinder isWithdrawn from said Work. i

7 A grinding machine comprising a rotative Work-holder, a reciprocatoryslide in a plane transverse to the axis of said Workholder, an arbormounted on said slide, a' grinder wheel mounted on said arbor, a rotaryshaft, a crank-and-pitman-rod connection between said shaft and saidreciprocatory slide for actuating the latter, an index- `ing disk u'po'nsaid rot-ary work-holder, a

reciprocatory paWl fo'r adjusting said indexV- ing disk, and a cam onsaid rotary shaft for controlling the operation of said pawldurA ing theinterval in 4which said grinder Wheel withdrawn from the Work.

v 8. A' grinding machine comprising a frame, a reciprocatory slidethereon, a grinding arbor and grinding -Wheel mounted: upon saidslide, arotative vWork-holder hav! ing its; axis transverse to the axis ofsaidarbor, a reciprocating member y connected with said slide, a screw feedmechanism in'-` termediate said reciprocating member and said slide, anindexing mechanism for said rotary Work-holder, and a cam on said in-.dexing mechanism operating once during each cycle thereof1 foradjusting said screwfeed mechanism.

9i A grinding machine comprising a' frame, a reciprocatory slide mountedon said frame, a rotative Work-holder arranged with its axis transverseto the plane of said slide,

a grinding arbor and grinderl Wheel mount- -ed on said slide and movabletherewith toward and from thesperiphery of the work on said worlcholder,an indexing disk on said work-holder, a reciprocatory-slide adjacent tosaid disk, a pawl carried by'said slide and -laterally movable thereonfor engaging said indexing disk, a rotary shaft, a cam on said shaft forintermittently reciprocating said pawl-carrying slide, a cooperating camon said shaft for disengagingsaid pawl from said disk, '.acrank-and-rod'connection 'between said shaft and said arborcarrying.

